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Theory of Machine

Theory of Machine
Relationship between the number of links (L) and number of pairs (P) is

P = 2L - 4
P = 2L - 2
P = 2L + 4
P = 2L + 2

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W cosθ
W cosecθ
W sinθ
W tanθ

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Theory of Machine
A circle passing through the pitch point with its center at the center of cam axis is known as

Base circle
Pitch circle
Outer circle
Prime circle

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Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

I₂/G
G².I₂
I₂/G²
G.I₂

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Theory of Machine
Critical damping is a function of

Mass and damping coefficient
Mass and natural frequency
Damping coefficient and natural frequency
Mass and stiffness

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Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

Are in phase
Lags by 90°
Leads by 90°
Leads by 180°

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